Bitmap ^bmp1;
Bitmap ^bmp2;      

 private: System::Void button1_Click(System::Object^  sender, System::EventArgs^  e) {
    // 開啟
    openFileDialog1->Filter = "影像檔(*.bmp)|*.bmp|所有檔案(*.*)|*.*";
    openFileDialog1->FilterIndex = 1;
    openFileDialog1->RestoreDirectory = true;
    openFileDialog1->DefaultExt = ".bmp|.jpg|";
    if(openFileDialog1->ShowDialog() == System::Windows::Forms::DialogResult::OK && openFileDialog1->FileName->Length > 0 )
    pictureBox1->Image =Image::FromFile(openFileDialog1->FileName); // 讀取影像
    String^ str1 = openFileDialog1->FileName;
    bmp1= gcnew Bitmap(str1);
    }

 private: System::Void button2_Click(System::Object^  sender, System::EventArgs^  e) {
    //負片效果
    int i,j;   
    Color rgb,rgb1;
    Byte R1,G1,B1;
    bmp2 = gcnew Bitmap(pictureBox1->Width,pictureBox1->Height);    
    for(j=0;j<>Height;j++)
    for(i=0;i<>Width;i++)
    {
      rgb=bmp1->GetPixel(i,j); // 讀取原影像每一點像素
      // RGB分解
      R1=rgb.R;
      G1=rgb.G;
      B1=rgb.B;     
      //負片方法   
      bmp2->SetPixel(i,j,Color::FromArgb(255-R1,255-G1,255-B1));// 存每一點處理後像素至另一影像
    }      
    pictureBox2->Image= bmp2;
    }

bX-r1ezpk

剛剛在修改Blog文章要檢視網誌時出現bX-r1ezpk的錯誤訊息...
因為在發生錯誤訊息之前有修改版面配置的HTML

下圖就是我為了highlight程式碼而必須加入的HTML
















我先將原本加入的程式碼刪除儲存後就回復正常了...
後來再重新回到版面配置修改HTML又可以了...

C# Image to CSV

這是一張10x10 pixel的點陣圖，我將它利用Photoshop放大成3200%















這個CSV檔是由上圖所讀取出來的，0代表黑色，255代表白色

以觀念來說這個CSV檔裡的數值是表示最上面那張10x10的圖沒錯

為了好看我用較好理解的寫法實現它，C#寫法如下:

   //開啟圖至pictureBox1
   private void btnOpen_Click(object sender, EventArgs e)
   {
       OpenFileDialog openFileDialog = new OpenFileDialog();
       openFileDialog.Filter = "BMP(*.BMP)|*.bmp|" + "所有檔案|*.*";
       if (openFileDialog.ShowDialog() == DialogResult.OK)
       {
           pictureBox1.Width = Image.FromFile(openFileDialog.FileName).Width;
           pictureBox1.Height = Image.FromFile(openFileDialog.FileName).Height;
           pictureBox1.Image = Image.FromFile(openFileDialog.FileName);
       }
   }

因為是黑白影像，這邊我只對R讀取。

private void btnProcess_Click(object sender, EventArgs e)
{           
 FileStream fw = new FileStream( @"c:\r.csv", FileMode.Open);
 StreamWriter sw = new StreamWriter(fw, System.Text.Encoding.Default);
 string str;
 Bitmap p1 = (Bitmap)pictureBox1.Image;
 int[,] r = new int[p1.Height, p1.Width];
 int[,] g = new int[p1.Height, p1.Width];
 int[,] b = new int[p1.Height, p1.Width];

 for (int i = 0; i < p1.Height; i++)
 {
  for (int j = 0; j < p1.Width; j++)
  {
   r[i, j] = p1.GetPixel(j, i).R; 
   if (j < p1.Width )
   {
    //最後一個值後面不用逗號
    if (j == p1.Width -1)
    {
     str = r[i, j] + "";
     sw.Write(str);
    }
    else
    {
     str = r[i, j] + ",";
     sw.Write(str);
    }
   }                   
  }
  //換行繼續下一個j迴圈寫入
  sw.Write('\n');
 } 
 sw.Flush();
 fw.Close();
 MessageBox.Show("執行完畢");
}

範例檔下載